In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Accused killer 'freaky', house 'creepy'

The young son of a woman accused of murdering autistic teenager Aaron Pajich says her co-accused was a "freaky person" who claimed to have no emotions, had a knife collection and once threatened him with a staple gun.

The 18-year-old was found in a shallow grave covered with newly-laid concrete and tiles in the backyard of an Orelia house occupied by Trudi Clare Lenon, her sons Cameron and Nicholas, and Jemma Victoria Lilley in June last year.

Lenon knew the avid gamer because he was a close friend of Cameron, but he was a stranger to 26-year-old Lilley.

In video recorded interviews played at their WA Supreme Court trial on Thursday, Cameron, 14, said he helped Lilley when she was laying the tiles by making sure pet cats didn't get in her way.

"I don't know why she wanted to do things with tiles," he told the detective.

Related Articles

The boy said Lilley told her she had "no emotion" and "doesn't feel for any person" but liked him.

He said he believed she was "grooming" him and she told him he could stay with her "if something happened to mum".

However, she was once angry with him when he used a word she didn't like - stupid - so she took a staple gun out of a bedroom drawer and held it up to him, he said.

"I had to quickly say sorry and she put the staple gun down."

Cameron said the house was "creepy", containing dolls of the horror movie characters Chucky and Freddy Krueger, knives on shelves and on windowsills and "little tiny cameras in the rooms, except for hers".

The boy was asked about a hidden, tarpaulin-covered room at the house that the jury was previously told had to be forced open by police, which prosecutors say could have been used to store a body for some time.

"It got blocked off and tarped-up at the window," Cameron said.

"She (Lilley) was going to do artwork in it and turn it into a waiting room for her tattoo clients.

"I don't know what happened in that room after that."

In the last fortnight that he lived in the house before staying with relatives, his mother was stressed and let him and his younger brother sleep in her room.

"That really shocked me because she never let us.

"I think Jemma scared her somehow."

Cameron said when detectives came to question his mother, he had no idea why.

A text message, allegedly from Lenon to Lilley, was shown to the jury and read: "I will fear you, but respect you. I would not challenge you. I would naturally submit to you ... I am in awe ... I see you as my Dominant".

The reply read: "100 per cent perfect."

The court previously heard Lenon had been a submissive participant in bondage, discipline and sadomasochistic role playing.